Fresh match-fixing claims are set to cast a shadow over the World Cup in the wake of allegations that officials connected to the Ghanaian FA were prepared to rig international friendly matches.

As part of a joint investigation with Channel 4's Dispatches, the Daily Telegraph filmed a registered Fifa agent, Christopher Forsythe and Obed Nketiah, who sits on the management committee of the Ghana under-20 team, allegedly promising they would be able to arrange a deal to rig international friendlies.

The pair allegedly claimed they would be able to "grease the palms" of Ghana officials to ensure the deal was signed and would include a clause allowing them to select the officials for the friendlies, who would then be able to influence the scoreline.

The Ghanaian FA immediately issued a statement which said the two men had been reported to the police "for misrepresenting the GFA with an attempt to defraud". It confirmed that Forsythe and Nketiah had approached its president, Kwesi Nyantakyi, with a proposal to buy the rights to friendlies for the Black Stars.

It claimed that they then turned up without appointment at the Ghanaian pre-World Cup training camp in Miami to discuss their offer, which was submitted to the GFA's legal committee.

"We wish to state that the GFA did not sign the contract as we waited for the response from the legal committee and that the two gentlemen did not make such corrupt offers to the GFA or its officials.".

However, the Telegraph alleged that Nyantakyi had agreed, on a "trial basis", to a contract that stated the investment company would pay $170,000 (£100,000) for each match and gave them the right to appoint match officials.

Forsythe and Nketiah denied any involvement in a plot to fix matches. Nketiah said: "These are false allegations and I will never in my life do such a thing."

Forsythe said: "To be frank everything I told [the Telegraph] about the match-fixing was a figment of my own imagination because I am so naive that I don't even know how matches are done. They were promises just to be able to get something off you."

Nyantakyi said he had not read the contract and he did not know about the deal to fix games. He said the proposed match would have been handled by a licensed Fifa match agent and he was unaware that Forsythe had demanded £30,000 for the GFA, the Telegraph reported.

Ghana drew 2-2 with Germany on Saturday but will face inevitable questions over the new claims, which are the latest in a long line of allegations that suggest football has an endemic problem with match-fixing.

There is no suggestion that any of the World Cup games or players are involved in any match-fixing.

On the eve of the World Cup, evidence resurfaced that the South African Football Association had been targeted in 2010 by match-fixers who claimed to be an agency organising friendly matches. A leaked Fifa investigative report showed that "five matches and possibly more" had been fixed in the runup to the 2010 World Cup. At least 15 friendly matches involving teams across the world were targeted, according to the New York Times.

A convicted match-fixer, Wilson Raj Perumal, had earlier lifted the lid on a world that relies on influencing match officials and players to manipulate the estimated $200bn-plus illegal betting markets in Asia and the far east.

He admitted to being part of a syndicate that fixed a string of international friendlies, sometimes even arranging for "bogus" teams to take part, by bribing corrupt officials and compromised players.

He also recently claimed in a new book that his activities had helped Honduras and Nigeria qualify for the 2010 World Cup. He said that the Honduras FA was unaware of his influence. The Nigerian FA denied his claims.

Perumal was arrested in Helsinki in 2011 and sentenced to two years in prison.

He agreed to co-operate with the authorities and implicated his fellow Singaporean Dan Tan, alleged to be at the heart of the fixing and gambling ring that placed bets on illicit Chinese markets.

Last year Europol alleged that more than 380 professional matches in Europe and more than 300 matches played in Africa, Asia and central and South America were under suspicion as the scale of the activities of match fixing gangs from eastern Europe and Asia became clear.

Earlier this week, two businessmen from Singapore and a former footballer, Michael Boeteng, were found guilty of attempting to rig football matches in the UK following an earlier investigation by the Telegraph.

Chann Sankaran and Krishna Sanjey Ganeshan, sentenced to five years each, claimed to have links to Perumal. Boeteng was sentenced to 18 months.

Fifa's head of security, Ralph Mutschke, has said that the final round of World Cup matches will be closely monitored because they were more susceptible to match fixing.

Increased concern over manipulation had caused Fifa to monitor friendly warm up matches across the world ahead of the 2014 tournament.

"We know that before the World Cup in South Africa matches were manipulated. Between May 15 and June 11 we monitored 98 friendly matches and for any repercussions and there were no surprises on the betting market," he said.

Kevin-Prince Boateng has hit back at the Ghana Football Association after being sent home early from the World Cup, describing the Black Stars’ organisation during the tournament in Brazil as “amateurish”